Hammer.



G. L. KOLLOCK & R. P. MARTIN.

HAMMER.

- Mmc/num FILED Imax. Isls.

LMA l Patented w1, 1917.

za l of Arron/vr GEORGE L. KOLLOCK AND ROBERT P. MARTIN, 0F SEATTLE, WASHINGTON, ASSIGNORS TO UNIVERSAL HAMMER COMPANY, OF SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON.

HAMMER.

Specification of Lettersy Patent.

Application led January 31, 1916. Serial No. 75,322.

To all /w/iom 'it may concern:

Be it known that we, GEORGE L. KoLLoCK and lonn'r l. l\'l.\n'riN, citizens of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Hammers, of which the following is a specification.

This invention relates to electrically controlled spring hammers of the class shown and described iniI our patent` application', Serial No. 49,243, filed Sept. 7, 1915.

The object of the present invention is to provide a more efficientv and inexpensively constructed tool of this nature, and the several improvements have in view these general results.

The invention consists in improvements in the entire machine and its various parts, and include, mainly, the frame, a spring-actuated hammer member provided With a cam element, a power driven rotary member cooperating with said cam element. to retract the hammer member, and electrical means to operate and regulate the action of said rotary member.

The invention further consists inthe novel construction, adaptation and combination of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a longitudinal sectional view partly in elevation, of an embodiment of our improved hammer. Fig. 2 is a similar view of portions of the hammer member and the controller therefor shown lin positions at right angles to those in which they are represented in Fig. 1. Fig. 3 is a transverse longi-.'

tudinal section illustrating a modified form of construction for the cam element of `the hammer member. Fig. 4 is a sectional view through 4 4 of Fig. 3. Fig. 5 is a fragmentary elevational view of a controller adapted for use with devices shown in Figs. 3 and 4. Fig. 6 is a diagrammatic view of the electric appliances employed in the invention. Fig. 7 is a longitudinal fragmentary sectional view of the casing with the hammer shank shown in elevation to illustrate the latter in modified form.

The casing of the hammer is formed of axially alined cylindrical and tapering por- `tions 11 and 12. This casing is provided in the part 11 with a chamber 13 terminating at a shoulder 14, and connects with a bore 15 which extends through the tapered part 12. l

. ing the die element is impinged by the other Which is thereby actuated to impart blows against the work.

The referred to cam element in its preferred form, Figs. 1 and 2, consists of a tubular head 20 formed in its inner periphery With two symmetrically arranged helical trackways 21 and 211 each of which eX- tend about a half of the circumference and terminate at axially disposed ridges 22 at diametrically opposite sides.

The head 20 is of less diameter than said chamber to afford an annular space 23 for a spring 24 which is interposed between a partition 25 provided in the chamber and a peripheral iange 26 provided on said head. Spline elements 27 are formed or provided on the head flange 26 and operable in grooves 28 in the casing wall to prevent the hammer member rotating during its reciprocatory movements. Cooperating with said cam element and fitting Within the same, is a cylindrical body 29 carrying at opposite sides studs 30 upon which are mounted rollers 31 adapted, when revolubly moved, to alternately engage the trackways 21 and 221 and e'ect anI Aaxial movement of the hammer member in opposition to the spring 24, until the rollers pass beyond the respective ridges when the spring asserts itself to operate the hammer member.

The body 29 is rigidly secured to a shaft 32 extending through the partition 25 and at the other side of the same has formed thereon or secured thereto an internal toothed gear 33 which is driven by an intermediate gear 34 from a pinio'n 35 provided in the armature shaft 36 of an electric motor 37. This motor is located in a compartment intermediate the partition 25 and the motor circuit 41 through the agency of a suitable switch which is designatedby 42.

43 represents a spring-opening switch 11o whereby an electric current may be supplied to energize said motor when theswitchvis closed by the operator manipulating linger 431 to move the switch into couple with the duce the friction due to the end thrusts derived from the lifting and striking power agents.

The modification shown in Figs. 3 and 4 illustrates a manner or means for providing a cam element 201 with helical trackways 212 and 213 which extend entirely around the inner periphery of the cam and disposed one above the other. With such a construction of cam, the coperating body 291 has the rollers 311 therefor arranged at a spaced distance apart axially of the body.

The operation of the invention is as follows:

With the resistance coil 40 in or out of circuit, according to the required power, the motor 37 upon being energized, imparts rotary motion through the gear train 35, 34 and 33 to the body 29, revolving the rollers 31.

These rollers tracking against the Ways 21 and 211 of the cam 20, cause the latter and the striking member 15to be moved up- Wardly and compress the opposing spring 24.l

-to rotate again elevates the striking member which is again influenced by the spring to afford reciprocatory movements to the striking member.

l What we claim, is-

Apparatus of the class described, comprising a casing, a striking member arranged for reciprocatory axial movements, a compression spring engaging said striking member, av hollow cam provided on said striking member, means extending axially into and engaging saidcam, an electric motor, and operative connections between the latter and said means for actuating the same to effect an endwise movement to said striking member.

Signed at Seattle, Washington, this 5th day of January 1916.

GEORGE L. KOLLOCK. ROBERT P. MARTIN.

Witnesses PIERRE BARNES, HORACE BARNES. 

